Dcorlock



Feb. 15, 1927. 1,617,655Y

IJ. c. SMITH DoormocxI Filed oct. 13. 1925 Patented el). l5, 1,927.

JOHN: CALVIN= SMITH, OF CHELSEA, lVIASSACTSCEYFCLS.v

DooaLocK. Y

Application filed October v13, 1925. Serial No. 62,260,

the intermediate'portion of the arm is disposed whereby said arm is 'normally held in locked engagement with the door, there being 'further provided means for releasing theV arm from the slot to facilitate the swinging movement of the arm out of engagement with lthe door to permit the latter to be -unlocked and opened.

A further object is to provide a door lock" of the above mentionedch'aracter, which is simple in construction, inexpensive, strong and ldurable and further well adapted to the purpose for which it is designed.

Other objects and` advantages 'of theinvention will become apparent during the .course of the followingrdescription. y

In the accompanying drawing forming a partof this application and in which' like numerals designate like part-s throughout the same:. Figure 1 is a view partly in elevation and partly in section of the door lock embodying my invention, showing the` position of the lookin@ arm when it is in' eno'afrement with Y' 2D t: b

the inner face of a door. e

Figure 2 is a vertical sectional view through the casing, showing the arrangement of the vertical shaft therein, and

Figure 3 isa bottom plan view of the lock as attached to the door frame.`

In the drawing, wherein for the purpose of illustration is shown thepreferred embodiment of my invention, the numeral 1 designates a substantially rectangular shaped casing, the same including front and rear walls2 andr 3, respectively, the sides 4 and, andv an vuppe'rlendwall 6L The lower endof the casing is open as is lclearly* illustrated in the drawing, and the casing is adapted to be secured on the iinnerface of the door frame A, through the mediumV of the fastening screws@ which extend through therear wall 3 of the casing. The side 'wall 4 of the lcasing is disposed adjacent the edge of the door frame,j and the `lowerportion of the aforementioned -side wall vhas, a vertical I slot 8 formedtherein, the purpose of which willl be hereinafter more fullydescribed.z

f Arranged, vertically within the lower portion of the casing, and adapted for rotation therein lisjth'e shaft vorV rod, 9.V Suitable guides lO'are .arranged inthe casing and CQ-l operate with theshaftor rod 9 for supporting the samein its propervertical position as is clearly illustrated in Figures land 2.'I i

The lower endV of this shaft or r'odis provide'd with a transversely extending screu'fv threaded opening 11, and threaded therein is .the reduced threadedlend r12 ofV the laterally extending locking arm 13. This arm is substantially rectangular in cross section,` and is adapted to be disposed normally within the slot 8 `formed in the lower end of the inner side 4 ofthe Vcasing l, the free vend of this arm extendingV transversely across the inner face of a vertically swinging door B. The free end of said arm is provided with an enlargement 14 which envgages theinner face of the vertically swing# ing door,` as clearly illustrated in Figure 3.

l/Vhen the arm. 13 has ybeen disposedwithrn the slot 8, the door is held in a locked position against unauthorizedopening and for the purpose ,of releasing the locking arm to permitthe opening of the door, I have, pro-`k vided a highly novel 'and4 simple means, the n construction of which will be presently de"-l scribed. I

A head 15 is formed on the upper edge' of the `vertically arranged shaftor rod 9,'the

same being also substantially'rectangular in design, and a notch 16 is formedV in the in-k ner side wall of said head, as clearly shown in FigureV 1. Cooperating with the notch 16 is the latch 17, the samebeing offangular design, the horizontally disposed portion y of said `latch having its outer edge beveled as indicated at 18 for cooperation with the notch 16. The vertically disposed portionA of said angular latch has its upper end re`V duced to provide a shoulder 19, and thepurpose thereof willv be presently apparent.

The angular latch is adapted forslidable movement rin a suitable guideV 2O associated withA the inner` sidewallll of the casing l,

as shown in Figure 1. Y For the purpose of normally holding the latch in locked engagement with the notched of the pawl for maintaining the Vsame in en-Y Y gagement with thel upper portion of the angular'latch. Y f Y A transversely extending shaft 24 is journaledfat its' respective endsin the front and rear walls 2 and 3 of the casing 1 adjacent the upper end thereof and'secured on the in-4 termediate portion of theshaft so as .to be disposed witl'iiii the casing is the segmental sleeve V25', the securing'meanstherefor being illustrated at 26.5 Formed on the segmental latter.

sleeve y25v andr depending therefrom Vis the lever 27the lower endthereof'being disposed Vlaterally as illustrated at 28 and adapted to engageY the outer base ofthe upper vportion ofithe vertically disposed portion of the i angular latches 17, as Shown nFgurel A handle v29 issecured on the forward end of 'the shaft 24 for actuating the same.

A AWith the 'parts arranged as shown in Figure 1 'of the drawing, the arm 13 will be held in engagement with the innerffaceof the door B so as to prevent the opening of the In `order that the door may be opened, it is necessaryV that the arm 13 be swung out of actuating the handle 29. It is of course to ber'understo'od that, if desired, a key lock may be associated with the shaft for also effecting the rotation thereof. Vhen the shaftrjotates in one direction, Vthe sleeve 25 which is secured on the shaft will be turned simultaneously.therewith, and as a result' Vthe laterally disposedlower end'28 of the leverV 27 which depends from the segmental Y sleeve willV force the spring pressed latch 17 inwardly out of engagement with the notchedjhead 15 formed on the upper end of the Y rod' 'or vertical shaft 9, and as soon as the latch is out of engagement with the' notched head 15, the coil springv30 which encircles the vertical shaftand is secured at one end to Y` v said shaft and at its opposite'end tothe l guide pin will force the vertical'shaf-t downwardly. It is understood that when the latch 17 is in engagement' with ,the notch in theV head 15, the coil V spring will be placed underrten'sion, and when the latch has been disengaged'from the notched head, the spring will automatically expand to move the veryftical shaft downwardly together -with'the arm 13 so as to disengage the arm from the engagement therewith and to- `accomplish this, the 'shaft 2e is rotated by slot 8, and when said arm is out of engagement vwith the slot 8, the coil spring 30 will furthermore cause the shaft 9 and the arm 13 to roatate, whereby said arm is swung in a horizontal plane, and thereby disengaging the free end ofthe arm from engagement "with the inner face of the vertically swinging door B. In this manner the lock is open, and the door may be easily and readily opened. n

lVhenthe parts are reset or returned to the position shown inY Figure 1, the arm 13 will hold thevdoor in a closed position,

It will thus be seen from the foregoing description, that a highly novel and simple door securing means has 'been provided which may ber'eadily and easily attached to the door frame, and will not in any way necessitate the alteration of either the frame or the door when installing the device.

l/Vhile I have shown the preferred embodiment of my invention, it is to be runderstood that minor changesin the size, shape, and arrangement of parts may be resorted to with# out departing from the spirit of the inven-l tion, and the scope ofthe appended claims. l Having fthus described the invention, what I claim as iiew is Y 1. A door lock comprising a Vcasing adapted to be secured on adoor'frame ad'- .jacent the free edge of the door, the inner .side of said casing having a slot formed in th-e lower portion thereof, a rotatable shaft rarranged vertically inthe casing and adapted I for Vslidable movement therein, an arm secured 4to the lower end of the shaftY and adapted for swinging movement therewith,

said arm being normally disposed through Y lthe slot and having the fre-e end thereof engaging the inner face ofv the door, means for locking Vthe arm in this slot, and means for automatically disengaging the arm from the slot and effecting the swinging movement of the arm to an inoperative position when said aforementioned locking means is operated. t

y2. A door lock comprising a casing haveA ing its lower end open, said casing adapted to be secured on a door frame adjacent the Y free edge ofthe vertically swinging door, the side of the casing adJacent the edge of the .door frame having a slot formed in the lower end portion thereof, a slidable and rotatable shaft arranged vertically within the casing, anal-m secured to the lower end of said shaft and extending laterally therefrom, means cooperating with said shaft for securing the arm in saidslot whereby the free end of the arm is held in engagement with the inner face of the'door, and means associated with the shaft forautomatically moving the same downwardly so as to disenga-ge the arm from saidslot andv iermit the swinging movement of said arm to an inoperative position when said locking meansis released. V

iso

3. A door lock comprising a casing, the lower end thereof being open, said casing adapted to be secured on the frame for a vertically swinging Vdoor adjacent the edge thereof, the sid-e of the kcasing adjacent said ,door edge having a slot formed in the lower to disengage the latter from said slot and to further permit the swinging movement of said arm to an inoperative position when said latch is released. f

4. A door lock comprising a casing, the lower end thereof being open, said casing adapted to be secured on the frame for a vertically swinging door adjacent the edge thereof, the side of the casing adjacent said door edge having a slot formed 1n the lower portion thereof, a shaft arranged vertically within the casing and adapted for rotationand slidable movement therein, an army secured to the lower end of said shaft and eX- tending laterally therefrom, a latch cooperating with the upper end of the shaft for holding' the same in its uppermost p-osition whereby the arm is maintained in the slot so that the free end of said arm is held in engagement with the inner face of the door, and means associated with the shaft for automatically lowering the shaft and said arm to disengage the latter from said 'sloth and to further permit swinging movement of said arm to an inoperative position when said latch is released, and means for disengaging the latch from engagement with the upper end of the shaft. i

A door lock comprising a casing, the

lower end thereof being open, said casingadapted to be secured on the frame for a vertically swinging door adjacent the edge thereof, the side of the casing adjacent said door edge having a slot formed in the lower portion thereof, a shaft arranged vertically within the casing and adapted for rotation and slidable movement therein, an arm secured to the lower end of the shaft and eX- tending laterally therefrom, a notched head on the upper end of said shaft, a spring urged latch cooperating with the notch and head for holding the shaft in its uppermost position whereby the laterally extending arm is held in the slot in the side of the casing so that the free end of Said arm is held in engagement with the inner face of the door,

-an expansible coil spring encircling said shaft, one end Vof 'said spring being vsecured to the shaft, the other end being` securedy within the casing, said coil spring being un-l der tension when the door engaging arm is held in said'slot and the latch is in 'engage ment with the notched head of the shaft, and means for releasing said latchwh'eii'eby the expansible coil will automatically.lower the vertical shaft and said armto-disengage the latter from the slot to further permit the swinging movement of the arm to inoperative position. f

6. A door lock comprising a casing, the lower end thereof being open, said casing adapt-ed to be secured onthe frame for a vertically swinging door adjacent the edge thereof, the side of the casing adjacent said door edge having a slot formed in the lower portion thereof, a shaft arranged vertically withinthe casing and adapted for `rotation and slidable movement therein, an armsecured to the lower end of the shaft and eX- tending laterally therefrom, a notched head on the upper end of said shaft, a spring rurged latch cooperating with the notch and head for holding the shaft in its uppermost position whereby the laterally extending arm is held 'in the slot in the side of the casing so that the free end of said arm is held ina engagement with the inner Vface of the door, an expansible coil spring encircling said shaft, one end of said spring being ysecured to the shaft` the other end being secured within the casing, said coil spring being under tension when the door engaging arm is held in said slot and the latch is in engagement with vthe notched head of the shaft,'and means for releasing said latch whereby the expansible coil will automatically lower the vertical shaft and said arm Y lower end thereof' being open, said casing` vadapted to be secured on the frame for a vertically swinging door adjacent the edge thereof, the side of the casing adjacent said door edge having a slot formed in the lower portion thereof, a shaft arranged vertically within thek casing and adapted for rotation andslidable movement therein, an arm sef holding the shaft inf its uppermost position whereby the arm is maintained in the slot so that the free end of said arm is held in engagement with the inner face of the door.

circling the lverticalshaft, one end thereof beingV secured to the shaft, the other end being secured to the casing, saidl coil spring Y beingV under tension- When the shaft is locked in its uppermost position., said coil spring adapted to automatically lower-the shaft and said varm to -disengage the latter from the slotl and to further Vpermit the swinging movementof the' arm'tor Van inoperative posi- Y tion When ythe latch is released,r and means for disengagng the latch from engagement with the notched head, saidiineans comprising a transverse shaft journaled for rotation in the upper portion of the casing, and a depending lever secured to the shaftand adapted to engage said sli'dabl'e latch for lmoving` th'ersame to an inoperative position; v

' In testimony whereof I aiiiX my signature.

JOHN CALVIN stern.Y 

